Kirkland Lake Gold announced new high-grade results from the ongoing underground drilling programs at the Fosterville Mine in Victoria, Australia. Recent underground infill drilling targeting the down-plunge extensions of Swan continues to return results that provide confirmation of the geological model and continuity of high-grade, visible-gold bearing mineralization on the Swan Fault. Results from 47 new drill holes, totaling 17,169 m, continue to return intervals with exceptionally high grades and visible-gold outside of the December 31, 2017 Measured and Indicated Mineral Resources in the Swan Zone. Recent drilling demonstrates the continuous nature of high-grade, visible-gold bearing quartz veins with substantial widths covering a down-dip extent of approximately 75 m, approximately 100 m down-plunge of current Mineral Reserves. In addition, drilling has confirmed that high-grade, visible-gold mineralization continues to be prevalent at least 200 m down-plunge from current Mineral Reserves. Reported drill results are from 47 holes, or 17,169 m, of which 20 contain visible-gold mineralization, and have greater than100 gram-m intercepts, with four of those intervals containing greater than 1,000 gram-m.

Kirkland Lake Gold announced an increase in the quarterly dividend to C$0.04 per common share from C$0.03 per common share previously. The dividend increase will be effective with the Q4 dividend payment, to be paid on January 11, 2019 to shareholders of record as of the close of business on December 31, 2018.

Kirkland Lake Gold announced that the company's Fosterville Mine is on track for record quarterly production in the fourth quarter of 2018, with full-year 2018 production now expected to exceed 330,000 ounces versus current guidance of 300,000 - 310,000 ounces. Fosterville's strong Q4 2018 performance largely reflects higher than expected grades and the advancement of two additional stopes from the high-grade Swan Zone into the mine's Q4 2018 production plan. Based on the improved outlook for Fosterville, the company now anticipates that full-year 2018 consolidated production will exceed the current target range of 655,000 - 670,000 ounces. On a quarter-to-date basis, the mill grade at Fosterville in Q4 2018 has averaged over 35.0 grams per tonne, well above target levels for the quarter. The outperformance largely relates to increased operating development activity around the Swan Zone and higher than planned grades from development tonnes processed. In addition, recent stope production from both the Swan and Eagle zones achieved substantially higher than expected grades. With increased operating development metres being completed, the Company has added two Swan Zone stopes to the mine plan for Q4 2018, which is also expected to contribute to increased levels of production.

Kirkland Lake Gold announced the appointments of David Soares as Chief Financial Officer and Eric Kallio as Senior Vice President, Exploration. Both appointments are effective immediately. The company also announced a number of internal management changes. Among the changes: John Landmark, currently Vice President, Exploration - Australia, will assume the role of Vice President, Human Resources, effective January 1, 2019; Pierre Rocque, Vice President, Canadian Operations, has been appointed Vice President, Technical Services; and Duncan King, General Manager, Canadian Operations, is appointed Vice President, Mining. The appointments for Rocque and King are effective immediately. In addition, Christina Ouellette, Executive Vice President, Human Resources, will retire from the company following a transition period with Landmark early in 2019. Doug Cater, Vice President, Exploration - Canada, will retire from the company as of January 1, 2019.

Kirkland Lake Gold announced record quarterly gold production of 180,155 ounces for Q3. Production in Q3 exceeded target levels for the quarter driven by record quarterly production from Fosterville of 90,618 ounces as well as from the company's Canadian operations, with Macassa, Holt and Taylor collectively producing 89,537 ounces. The company completed Q3 well positioned to achieve the improved FY18 consolidated production guidance of over 635,000 ounces. Gold poured in Q3 totaled 187,331 ounces, with total gold sales of 184,509 ounces. Tony Makuch, president and CEO of Kirkland Lake Gold, commented, "Q3 2018 was a record quarter for both Fosterville in Australia and our Canadian operations as a whole. At Fosterville, we commissioned a second gravity circuit during Q3 2018 and saw an immediate spike in production, with the Fosterville Mill processing over 18,000 ounces in the first week of the circuit's operation. This spike can largely be attributed to the gravity circuit's effectiveness in recovering gold previously contained in the recirculating load of the grinding circuit. We also mined and processed our first Swan Zone stope during the quarter, which contributed over 7,500 ounces of production at an average grade of close to 40 g/t, in line with target levels. Turning to our Canadian operations, record production across our three mines reflected strong results at Macassa, where Q3 2018 production was very much in line with target levels, our best quarter of production to date at Holt and a better production performance from Taylor Mine compared to the previous quarter. Heading into the final quarter of the year, we are very well positioned to achieve our improved 2018 consolidated production guidance of over 635,000 ounces."

Kirkland Lake Gold announced that it has acquired 14,705,882 common shares of Osisko Mining by way of private placement financing at a price of C$1.70 per share for a total cash payment of approximately C$25M. Prior to the Investment, Kirkland Lake Gold held 17,921,750 Shares, representing approximately 8.58% of the outstanding Shares on a non-diluted basis. As of the date hereof, after giving effect to Investment, the company beneficially owns 32,627,632 Shares, representing approximately 13.61% of the currently issued and outstanding Shares on a non-diluted basis. All of the securities issued in the private placement financing are subject to a statutory hold period expiring on January 19, 2019.